Remove obsolete thread-alive-p

* etc/NEWS (thread-alive-p):
* lisp/thread.el (thread-alive-p):
* src/thread.c (thread-alive-p): Remove.

etc/NEWS

@@ -44,10 +44,12 @@ applies, and please also update docstrings as needed.
 
 ** 'equal' no longer examines some contents of window configurations.
 Instead, it considers window configurations to be equal only if they
-are eq.  To compare contents, use compare-window-configurations
-instead.  This change helps fix a bug in sxhash-equal, which returned
+are 'eq'.  To compare contents, use 'compare-window-configurations'
+instead.  This change helps fix a bug in 'sxhash-equal', which returned
 incorrect hashes for window configurations and some other objects.
 
+** The obsolete function 'thread-alive-p' has been removed.
+
 
 * Lisp Changes in Emacs 28.1
 

lisp/thread.el

@@ -43,8 +43,6 @@ An EVENT has the format
             (err (cddr event)))
         (message "Error %s: %S" thread err))))
 
-(make-obsolete 'thread-alive-p 'thread-live-p "27.1")
-
 ;;; The thread list buffer and list-threads command
 
 (defcustom thread-list-refresh-seconds 0.5

src/thread.c

@@ -1114,9 +1114,6 @@ syms_of_threads (void)
       staticpro (&last_thread_error);
       last_thread_error = Qnil;
 
-      Fdefalias (intern_c_string ("thread-alive-p"),
-		 intern_c_string ("thread-live-p"), Qnil);
-
       Fprovide (intern_c_string ("threads"), Qnil);
     }